netdev - Re: [PATCH] NET : rt_check_expire() can take a long time, add a cond

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Message-ID: <20071117214640.GA16314@one.firstfloor.org>
Date:	Sat, 17 Nov 2007 22:46:40 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	"David S. Miller" <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH] NET : rt_check_expire() can take a long time, add a cond_resched()

> The 25.000.000 ns and 88.000.000 ns numbers where on an empty table, but 
> large (16 MB of memory)

This would mean that cond_resched() needs ~4x as much time as checking
an empty bucket. I find that somewhat hard to believe.

-Andi
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